1948-49
Assistant to the Director Byzantine Institute Mission to Istanbul restoring mosaics and frescoes in the Church of the Chora (Kariyeh Jamii)
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1949-50
Instructor in Medieval History at the College of Puget Sound, Tacoma Washington
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1950-52
Head Orbit Films Inc., Seattle Washington film production company
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1952-53
Graduate Student Department of Anthropology Harvard University
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1954-55
Teaching Fellow Harvard University
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1957-97
Founding Director Film Study Center, Harvard University
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1957
Member Harvard team to film the Kalahari Bushmen of Southwest Africa
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1959-60
Instructor ethnographic film workshop in the Peabody Museum, Harvard
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1960-61
Leader of Harvard team to the Grand Valley of the Baliem in Netherlands New Guinea
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1962-74
Lecturer on Visual Studies Harvard University
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1972, 74
Acting Director Carpenter Center for the Visual Arts Harvard University
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1974-99
Senior Lecturer on the Osgood Hooker Endowment in the Department of Visual and Environmental Studies Harvard University
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1974-77
Chairman Department of Visual and Environmental Studies Harvard University
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1975-84
Director of the Carpenter Center for Visual Arts Harvard University
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1991-92
Acting Curator Harvard Film Archive
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1993-94
Director of the Carpenter Center for Visual Arts
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2000-
Associate in the VES Department Harvard University
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